Update SELinux userspace packages to 3.10

[MatricalDefunkt]

This pull request updates all SELinux-related packages (libsepol, libselinux, libsemanage, checkpolicy, and mcstrans) from version 3.9 to 3.10. The changes include version bumps, updated sources and checksums, and some minor adjustments to metadata and dependencies to match the new release.

Version and Source Updates:

• Bumped package versions to 3.10 for libsepol, libselinux, libsemanage, checkpolicy, and mcstrans in both .SRCINFO and PKGBUILD files.
• Updated source URLs to point to the 3.10 release tarballs and their corresponding .asc signature files.

Checksum and Dependency Adjustments:

• Updated sha256sums for all packages to match the new 3.10 release files.
• Updated dependencies to require the new minimum versions (e.g., libsepol>=3.10, libselinux>=3.10).

Metadata and Licensing:

• Updated provides fields to reflect the new version and release numbers.
• Changed the license for libselinux from custom to libselinux-1.0 to match upstream.

PGP Key and Miscellaneous Cleanup:

• Removed the obsolete PGP key for Petr Lautrbach (E853C1848B0185CF42864DF363A8AD4B982C4373) from libselinux.
• Deleted the corresponding PGP public key file (_pgp_cache/E853C1848B0185CF42864DF363A8AD4B982C4373.asc).

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CI Passes on Actions (except, as should be expected, the release job)

[fishilico]

Thanks for your Pull Request! I have updated the packages in the AUR and updated the git submodules (the git history with the generated commits is available on https://github.com/archlinuxhardened/selinux/commits/732114557b0a905543a4ee5388df43f80972b769/ ).

I am now closing this Pull Request as it is completed.